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Troubleshooting
Start
See reverse side for
wiring diagram and
relevant color-coded
test positions.
●
Yes
●
Yes
●
Yes
Yes No
No
No
Yes
No
Recover refrigerant,
remove moisture and
air from system, charge
with fresh refrigerant
to nameplate amount
Check for a fan motor
issue, restricted line
set or EEV, or lack of
refrigerant
Check for a plugged coil or
refrigerant charge
●
Replace sensor
The discharge line temperature
is below 230°F/110°C?
The discharge sensor
reading matches the
resistance table in the
Service Manual?
With system on, the
discharge sensor climbs to
230°F within a short time, and
the compressor stops?
With system on, the
discharge sensor climbs to
230°F after several minutes,
and the compressor stops?
allow the discharge line to cool
Refrigerant static test
indicates head pressure
converted to temperature is
higher than ambient?
Error Code (Indoor/Outdoor)
F4/LED1: 8 Flash
Complete the “Check This First” Flow
Chart before continuing.
Models:
AW09EH2VHD/ASYW09URDWD
AW12EH2VHD/ASYW12URDWD
AW18EH2VHD/ASYW18URDWD
1U09EH2VHE/ASH109URDSE
1U12EH2VHE/ASH112URDSE
1U18EH2VHE/ASH118URDSE
ERROR CODES and Troubleshooting
PAGE 85
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